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 27 Feb 2007, Piotr Zolnierczuk, Forum, event builder scalability
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 27 Feb 2007, Stefan Ritt, Forum, event builder scalability
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27 Feb 2007, John M O'Donnell, Forum, event builder scalability
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27 Feb 2007, Stefan Ritt, Forum, event builder scalability
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02 Mar 2007, Kevin Lynch, Forum, event builder scalability
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03 Mar 2007, Piotr Zolnierczuk, Forum, event builder scalability
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03 Mar 2007, Stefan Ritt, Forum, event builder scalability
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Message ID: 355
Entry time: 27 Feb 2007
In reply to: 353
Reply to this: 356
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| Author: |
John M O'Donnell |
| Topic: |
Forum |
| Subject: |
event builder scalability |
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At Los Alamos, we have 15+1 frontends - the 15 between them read about 2 or 3
TB/hour and reduce it to 1 to 5 GB/hour which is then sent to the mevb on a 17th
computer. The 16th frontend handles deadtime issues and scalers (small data rate).
frontends are 1GHz pentium 3, and backend is 2.8GHz dual CPU with hyperthreading.
Interconnect is 100Mb ethernet from frontends to switch, and 1Gb ethernet from
switch to backend.
Our bottle neck is (a) compactPCI backplane reading data from waveform digitizers
to the frontend CPUs and (b) CPU power on the frontend CPUs to analyzer the waveforms.
John |